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Vessels and subsidiaries, Vessels and time charter contracts (Details)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Vessel
Reconciliation of changes in property, plant and equipment [abstract]        
Net book value $ 1,476,436,000   $ 1,467,846,000 $ 1,476,436,000
Impairment [Abstract]        
Non-cash impairment charge $ 7,600,000 $ 4,900,000   $ 12,600,000
Number of vessels recorded non-cash impairment charge | Vessel       3
Percentage of estimated weighted average cost of capital 8.59% 8.12%    
Percentage of decreasing the weighted average cost of capital 0.50%      
Impact of a 0.5% adverse change of weighted average cost of capital on impairment charge $ 1,500,000      
Increasing/(decreasing) in future charter rates per day 500      
Impact of $500 per day adverse change of future charter rates on impairment charge 1,400,000      
Impact of $500 per day favorable change of future charter rates on impairment charge (1,400,000)      
Cost [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     2,130,204,000 $ 2,115,745,000
Additions     68,156,000  
Transferred from vessels upgrades     122,907,000 22,964,000
Disposals     (155,664,000) (8,505,000)
Balance, end of period 2,130,204,000   2,165,604,000 2,130,204,000
Accumulated Depreciation and Impairment [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     (653,769,000) (526,301,000)
Charge for the period     (127,743,000) (123,412,000)
Impairment charges       (12,560,000)
Disposals     83,754,000 8,505,000
Balance, end of period (653,769,000)   (697,758,000) (653,769,000)
Vessel Upgrades [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     17,269,000 11,652,000
Additions     106,010,000 28,581,000
Transferred to vessels     (122,907,000) (22,964,000)
Balance, end of period 17,269,000   372,000 17,269,000
Time Charter Contracts [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Net book value 452,000   0 452,000
Time Charter Contracts [Member] | Cost [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     6,600,000 6,600,000
Additions     0  
Transferred from vessels upgrades     0 0
Disposals     (6,600,000) 0
Balance, end of period 6,600,000   0 6,600,000
Time Charter Contracts [Member] | Accumulated Depreciation and Impairment [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     (6,148,000) (5,170,000)
Charge for the period     (452,000) (978,000)
Impairment charges       0
Disposals     6,600,000 0
Balance, end of period (6,148,000)   0 (6,148,000)
Time Charter Contracts [Member] | Vessel Upgrades [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     0 0
Additions     0 0
Transferred to vessels     0 0
Balance, end of period 0   $ 0 0
VLCC [Member]        
Impairment [Abstract]        
Impairment rate for time charter equivalents, remaining period in current year   $ 20,107    
Impairment rate for time charter equivalents, first year   21,550   19,610
Impairment rate for time charter equivalents, second year   21,194   25,279
Impairment rate for time charter equivalents, thereafter   $ 42,557   $ 42,466
Percentage of reduction in impairment rate   20.00%   20.00%
Consideration period for reduction in impairment rate     15 years  
VLCC [Member] | VLCCs built 2015 and Later [Member]        
Impairment [Abstract]        
Lower fuel consumption for modern vessels   $ 4,000   $ 4,000
Vessels [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Net book value 1,423,981,000   $ 1,405,420,000 1,423,981,000
Depreciation and amortisation expense [abstract]        
Estimated useful life of assets     20 years  
Vessels [Member] | Cost [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     $ 2,020,690,000 2,015,795,000
Additions     66,531,000  
Transferred from vessels upgrades     75,417,000 4,896,000
Disposals     (110,713,000) 0
Balance, end of period 2,020,690,000   2,051,924,000 2,020,690,000
Vessels [Member] | Accumulated Depreciation and Impairment [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     (596,709,000) (487,996,000)
Charge for the period     (94,700,000) (96,153,000)
Impairment charges       (12,560,000)
Disposals     44,905,000 0
Balance, end of period (596,709,000)   (646,504,000) (596,709,000)
Vessels [Member] | Vessel Upgrades [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     2,788,000 1,371,000
Additions     72,861,000 6,313,000
Transferred to vessels     (75,417,000) (4,896,000)
Balance, end of period 2,788,000   232,000 2,788,000
Drydock [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Net book value 20,963,000   36,602,000 20,963,000
Drydock [Member] | Cost [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     51,843,000 50,868,000
Additions     139,000  
Transferred from vessels upgrades     30,158,000 9,480,000
Disposals     (27,772,000) (8,505,000)
Balance, end of period 51,843,000   54,368,000 51,843,000
Drydock [Member] | Accumulated Depreciation and Impairment [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     (30,880,000) (26,629,000)
Charge for the period     (13,270,000) (12,756,000)
Impairment charges       0
Disposals     26,383,000 8,505,000
Balance, end of period (30,880,000)   (17,766,000) (30,880,000)
Drydock [Member] | Vessel Upgrades [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     3,265,000 0
Additions     27,033,000 12,745,000
Transferred to vessels     (30,158,000) (9,480,000)
Balance, end of period 3,265,000   140,000 3,265,000
Scrubbers [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Net book value 31,039,000   25,824,000 31,039,000
Impairment [Abstract]        
Lower fuel consumption for modern vessels   $ 3,000   4,000
Scrubbers [Member] | Cost [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     51,071,000 42,482,000
Additions     1,486,000  
Transferred from vessels upgrades     17,333,000 8,589,000
Disposals     (10,579,000) 0
Balance, end of period 51,071,000   59,311,000 51,071,000
Scrubbers [Member] | Accumulated Depreciation and Impairment [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     (20,032,000) (6,507,000)
Charge for the period     (19,322,000) (13,525,000)
Impairment charges       0
Disposals     5,866,000 0
Balance, end of period (20,032,000)   (33,488,000) (20,032,000)
Scrubbers [Member] | Vessel Upgrades [Member]        
Reconciliation of changes in property, plant and equipment [abstract]        
Balance, beginning of period     11,216,000 10,281,000
Additions     6,117,000 9,524,000
Transferred to vessels     (17,333,000) (8,589,000)
Balance, end of period 11,216,000   $ 0 11,216,000
DHT China [Member]        
Impairment [Abstract]        
Non-cash impairment charge       2,800,000
Recoverable amount 38,400,000     38,400,000
DHT Europe [Member]        
Impairment [Abstract]        
Non-cash impairment charge       6,300,000
Recoverable amount 38,000,000.0     38,000,000.0
DHT Scandinavia [Member]        
Impairment [Abstract]        
Non-cash impairment charge       3,500,000
Recoverable amount $ 40,400,000     $ 40,400,000